Upper portion of a chair



FIG. 1 is an environmental perspective view of an upper portion of achair showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view with the left side being amirror image thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken line showing of the chair legs in FIGS. 1, 3, 4, and 5 is forillustrative purposes only, merely disclosing the types of legs whichmay be used, and forms no part of the claimed design. The bottom view isplain and unornamented.

The ornamental design for an upper portion of a chair, as shown and described. 